T60 wifi: Radio disabled by HW RF Kill switch?

[R. Luoma]

I am still struggling with the T60 (using Ubuntu 9.04)

By fiddling around with device file permissions, I finally got sound working,
by wifi stubbornly refuses to work.  For dmesg, I get the following:

[   11.526091] iwl3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux, 1.2.26ks
[   11.526095] iwl3945: Copyright(c) 2003-2008 Intel Corporation
[   11.526211] iwl3945 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[   11.526226] iwl3945 0000:03:00.0: setting latency timer to 64
[   11.526266] iwl3945: Detected Intel Wireless WiFi Link 3945ABG
[   11.526457] iwl3945 0000:03:00.0: irq 2296 for MSI/MSI-X
[   11.580601] iwl3945: Tunable channels: 11 802.11bg, 13 802.11a channels
[   11.581503] phy0: Selected rate control algorithm 'iwl-3945-rs'
[   13.624090] iwl3945: Radio Frequency Kill Switch is On:
[   20.474760] iwl3945 0000:03:00.0: firmware: requesting iwlwifi-3945-1.ucode
[   20.525255] iwl3945: Radio disabled by HW RF Kill switch

Needless to say, the Fn wifi button has no effect> and the BIOS
claims that the wifi is up and running.

Does anyone have useful suggestions on how to toggle this mysterious HW RF Kill switch?

Thank,
-- 
R. Luoma